It is possible using JGAP commercially (namely under the MPL - Mozilla Public License). The MPL doesn't force you to make your source code public, even if you modify the JGAP codebase. If you want to use JGAP under the MPL, you must donate at least $50 to the JGAP project.
Then you are eligible of using JGAP on your site with as many developers as you want. A site typically is a building located at a certain place, distinguishable from other buildings. Each building represents a site. Of course, different company locations are different sites.
You are encouraged to donate more than $20 if your company uses JGAP extensively or your company is quite big!
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